Thursday, September 13, 2007

Planet Of No Apes? Experts Warn It's Close

"Great apes have rich emotional lives and share strong family bonds. They laugh when they are tickled, cry when they grieve. They can make and use tools. They think about their past and plan for their future.

But many won't have a future to plan for, conservationists say.



The Western Gorilla - the most common gorilla in the world - is now "critically endangered," just one step away from global extinction, according to the 2007 Red List of Threatened Species released Wednesday by the World Conservation Union.

The Ebola virus is depleting populations to a point where it might become impossible for them to recover. Commercial hunting, civil unrest and habitat loss due to logging and forest clearance for palm oil plantations are compounding the problem, said the Swiss-based group, known by its acronym, IUCN.

"Great apes are our closest living relatives and very special creatures," Russ Mittermeier, head of IUCN's Primate Specialist Group, told The Associated Press. "We could fit all the remaining great apes in the world into two or three large football stadiums. There just aren't very many left.""

Tuesday, September 11, 2007

Gifted research parrot Alex found dead

"Alex, a parrot who could count to six, identify colors and even express frustration with repetitive scientific trials, has died after 30 years of helping researchers better understand the avian brain.



The cause of Alex's death was unknown. The African Grey parrot's average life span is 50 years, Brandeis University scientist Irene Pepperberg said. She said Alex was discovered dead in his cage Friday but she waited to release the news until this week so grieving researchers could get over the shock and talk about it.

"It's devastating to lose an individual you've worked with pretty much every day for 30 years," Pepperberg told The Boston Globe. "Someone was working with him eight to 12 hours every day of his life."

Alex's advanced language and recognition skills revolutionized the understanding of the avian brain. After Pepperberg bought Alex from an animal shop in 1973, the parrot learned enough English to identify 50 different objects, seven colors, and five shapes. He could count up to six, including zero, was able to express desires, including his frustration with the repetitive research.

He also occasionally instructed two other parrots at the lab to "talk better" if they mumbled, though it wasn't clear if he was simply mimicking researchers.

Pepperberg said Alex hadn't reached his full cognitive potential and was demonstrating the ability to take distinct sounds from words he knew and combine them to form new words. Just last month, he pronounced the word "seven" for the first time.

Pepperberg said the last time she saw Alex was Thursday. They went through their goodnight routine, in which she told him it was time to go in the cage and said: "You be good, I love you. I'll see you tomorrow."

Alex responded, "You'll be in tomorrow.""

Blue Danube

Last week I was invited to attend the Steinway premiere of their 'Black Tie' tuxedo line at Steinway Hall in Manhattan, across from Carnegie Hall.

This was the couple (Anderson and Roe) that performed for us. I especially appreciated this particular piece (which they closed with), as it's what I *tried* to perform at my grandparent's 50th wedding anniversary many years ago! Who knew I needed a second pair of hands?




If interested, you can learn more about them here.

Sunday, September 09, 2007

What will happen when machines outthink us?

"At the center of a black hole there lies a point called a singularity where the laws of physics no longer make sense.

In a similar way, according to futurists gathered Saturday for a weekend conference, information technology is hurtling toward a point where machines will become smarter than their makers. If that happens, it will alter what it means to be human in ways almost impossible to conceive, they say.

"The Singularity Summit: AI and the Future of Humanity" brought together hundreds of Silicon Valley techies and scientists to imagine a future of self-programming computers and brain implants that would allow humans to think at speeds nearing today's microprocessors.

Artificial intelligence researchers at the summit warned that now is the time to develop ethical guidelines for ensuring these advances help rather than harm.

"We and our world won't be us anymore," Rodney Brooks, a robotics professor at the Massachusetts Institute of Technology, told the audience. When it comes to computers, he said, "who is us and who is them is going to become a different sort of question."

Eliezer Yudkowsky, co-founder of the Palo Alto-based Singularity Institute, which organized the summit, focuses his research on the development of so-called "friendly artificial intelligence." His greatest fear, he said, is that a brilliant inventor creates a self-improving but amoral artificial intelligence that turns hostile.

T-minus 22 years?
The first use of the term "singularity" to describe this kind of fundamental technological transformation is credited to Vernor Vinge, a California mathematician and science-fiction author.

High-tech entrepreneur Ray Kurzweil raised the profile of the singularity concept in his 2005 book "The Singularity is Near," in which he argues that the exponential pace of technological progress makes the emergence of smarter-than-human intelligence the future's only logical outcome.

Kurzweil, director of the Singularity Institute, is so confident in his predictions of the singularity that he has even set a date: 2029.

Most "singularists" feel they have strong evidence to support their claims, citing the dramatic advances in computing technology that have already occurred over the last 50 years.

In 1965, Intel co-founder Gordon Moore accurately predicted that the number of transistors on a chip should double about every two years. By comparison, singularists point out, the entire evolution of modern humans from primates has resulted in only a threefold increase in brain capacity.

With advances in biotechnology and information technology, they say, there's no scientific reason that human thinking couldn't be pushed to speeds up to a million times faster.

Is the ‘nerdocalypse’ near?
Some critics have mocked singularists for their obsession with "techno-salvation" and "techno-holocaust" _ or what some wags have called the coming "nerdocalypse." Their predictions are grounded as much in science fiction as science, the detractors claim, and may never come to pass.

But advocates argue it would be irresponsible to ignore the possibility of dire outcomes.

"Technology is heading here. It will predictably get to the point of making artificial intelligence," Yudkowsky said. "The mere fact that you cannot predict exactly when it will happen down to the day is no excuse for closing your eyes and refusing to think about it.""

Tuesday, September 04, 2007

"Researchers at IBM will have two papers published in the journal Science this week detailing how it may be possible to use individual atoms, or groups of atoms, to store data or act as a transistor.



The work revolves around harnessing magnetic anisotropy, a property of atoms. Something is anisotrophic if it has different values when it faces in different directions. If a substance is anisotrophic and the orientation of the substance can be controlled, then the orientation--the theory goes--of the atom can come to represent the 1s and 0s of digital computing.

Potentially, atomic-level storage or switching could result in incredibly tiny computers. With atomic storage, you could fit a 1,000 trillion bits of information in an iPod, according to IBM estimates.

In the first paper, titled "Large Magnetic Anisotropy of a Single Atomic Spin Embedded in a Surface Molecular Network," researchers described how they arranged individual iron atoms with a scanning tunneling microscope on a specially prepared copper surface. With the atoms in place, the researchers were then able to measure the strength and orientation of the anisotrophy of the individual atoms.

The second paper, meanwhile, describes the performance of a switch created from two hydrogen atoms inside an organic molecule called naphthalocyanine. Researchers have made single-atom switches before, but the molecules had a tendency to change shapes. This problem has not, so far, surfaced in the IBM molecular switch. (Interestingly, IBM discovered the properties of naphthalocyanine by accident. It was studying the molecule in a separate project, on vibration.)"

Friday, August 24, 2007

Scientists simulate out-of-body experiences

"New virtual-reality experiments show the brain can be tricked into believing it's outside the body, lending credence to the strange claims of some patients and shedding light on how the brain might generate its "self-image."

“We have decades of intense research on visual perception, but not very much yet on body perception," said Henrik Ehrsson of University College London.

"But that may change, now [that] virtual reality offers a way to manipulate full-body perception more systematically and probe out-of-body experiences,” said Olaf Blanke, a Swiss Federal Institute of Technology neuroscientist.

The researchers worked on separate studies, which are detailed Thursday in the online edition of the journal Science.



Researchers equipped subjects with virtual-reality goggles that showed images from a stereoscopic video camera setup — two cameras spaced like a pair of eyes. When placed behind the person wearing the goggles, the cameras acted as a "virtual self" that looked at the subject's back.

As subjects watched themselves from behind, an experimenter prodded their chests with one hand while prodding the air just below the cameras at the same time. Because subjects could see the experimenter's hand but not the spot it was poking, researchers said subjects felt as if they were being poked in the chest — outside their bodies.

“This was a bizarre, fascinating experience for the participants," Ehrsson said. "It felt absolutely real for them and was not scary. Many of them giggled and said ‘Wow, this is so weird.’”

Where's my body?
But the researchers didn't stop there. They also performed the experiment with cameras behind a wigged mannequin to test the brain's limits of self-perception.

When they saw a bodily shape, they still felt it was them," said Bigna Lenggenhager, a psychologist also with the Swiss Federal Institute of Technology. She explained that touching both the fake body and the real body at the same time tricked many of the subjects.

"They felt a touch was there but couldn't pinpoint it," Lenggenhager said, noting that some felt as if the mannequin was their own body.

Going even further to test the effect, researchers removed subjects' goggles and asked them to move to where they believed they were standing during the experiment. Almost every time, she said, they overshot and walked back to their virtual self's location — and not where their real or simulated body was situated.

"They didn't localize themselves where their real body was," Lenggenhager told LiveScience.com. "Where the camera was is where they believed they were."

Monday, August 20, 2007

Sonic Boom!

A Sonic Boom
Credit: Ensign John Gay, USS Constellation, US Navy



Explanation: Is this what a sonic boom looks like? When an airplane travels at a speed faster than sound, density waves of sound emitted by the plane cannot precede the plane, and so accumulate in a cone behind the plane. When this shock wave passes, a listener hears all at once the sound emitted over a longer period: a sonic boom. As a plane accelerates to just break the sound barrier, however, an unusual cloud might form. The origin of this cloud is still debated. A leading theory is that a drop in air pressure at the plane described by the Prandtl-Glauert Singularity occurs so that moist air condenses there to form water droplets. Above, an F/A-18 Hornet was photographed just as it broke the sound barrier. Large meteors and the space shuttle frequently produce audible sonic booms before they are slowed below sound speed by the Earth's atmosphere.

Saturday, August 04, 2007

Apes play charades to communicate

"When humans play charades, the game's ban on talk often reduces players to wild gestures in a frustratingly minimalist form of communication. Still, skillful players get the point across eventually.

Apes can't talk at all, of course. But now scientists have found that orangutans rely on the same kinds of strategies seen in charades when they try and get their point across.



The finding hints at how the earliest forms of language might have developed among humanity's ancestors.

Ape the humans
Charades involves using only body language to act out a word or phrase that others must guess. When playing charades, people often repeat and hone gestures that have already worked and abandon ones that did not. This strategy not only improves a player's chances of picking effective gestures, but also gives hints to partners on how well or poorly they are doing.

To see how capable orangutans are of communicating with people via gestures, psychologists Erica Cartmill and Richard Byrne at the University of St. Andrews in Scotland presented six adult female orangutans in zoos a chance to essentially play charades.

The apes were shown one tempting food item, such as bananas or whole-grain bread, and one not-so-tempting food item, such as celery or leeks. The food could only be reached by signaling for human help, such as by pointing with fingers, blowing a "raspberry" or spitting through the bars.

At times, the researchers purposefully misunderstood the orangutans' requests. Sometimes they provided only half of the delicious treat, while other times they handed over the unsavory alternative instead.

When people pretended not to comprehend what the apes' aims were, the creatures relied on the same basic strategy people follow in playing charades.

"The orangutans made a clear distinction between total misunderstanding, when they tended to give up on the signals they'd used already and use new, but equivalent, ones to get the idea across, and partial misunderstanding, when they tended to repeat the signals that had already partially worked, keeping at it with vigor," Cartmill said. "The response showed that the orangutan had intended a particular result, anticipated getting it and kept trying until it got the result."

Byrne noted that "looking at the tapes of the animal's responses, you can easily work out whether the orangutan thinks it has been fully, partially or not understood."

"In effect, they are passing information back to the audience about how well they are doing in understanding them — hence our 'charades' analogy," Byrne added. He and Cartmill detailed their findings Aug. 2 in the journal Current Biology.

Eager to play
Cartmill noted that the term "experiment" has gained an undeserved association with invasive or artificial studies." "The individuals I tested treated the experiment as a sort of game and eagerly approached me as I set up the equipment, hoping to succeed in winning the banana this time," she said.

Primate psychologist Anne Russon at York University in Toronto said these findings add weight "to the view that great apes—probably all of them [including orangutans]—can communicate intentionally and can do so well beyond basic levels."

Russon noted orangutans play a very important role in understanding the evolution of advanced communication because they are the "oldest" of the great apes, having diverged as a distinct species far earlier than any of the African great apes—12 to 15 million years ago versus 4 to 8 million years ago.

These findings "therefore make it very likely that the mental abilities which support this sophisticated intentional communication evolved when the earliest great apes evolved, some 12 to 15 million years ago," Russon said. "That is, they place the origins of intentional communication well prior to human evolution."

Royal Aztec crypt wows archaeologists

Finding could be first tomb of ruler from this civilization ever discovered

"Mexican archaeologists using ground-penetrating radar have detected underground chambers they believe contain the remains of Emperor Ahuizotl, who ruled the Aztecs when Columbus landed in the New World. It would be the first tomb of an Aztec ruler ever found.



The find could provide an extraordinary window into Aztec civilization at its apogee. Ahuizotl (ah-WEE-zoh-tuhl), an empire-builder who extended the Aztecs’ reach as far as Guatemala, was the last emperor to complete his rule before the Spanish Conquest.

Accounts written by Spanish priests suggest the area was used by the Aztecs to cremate and bury their rulers. But no tomb of an Aztec ruler has ever been found, in part because the Spanish conquerors built their own city atop the Aztec’s ceremonial center, leaving behind colonial structures too historically valuable to remove for excavations.

One of those colonial buildings was so damaged in a 1985 earthquake that it had to be torn down, eventually giving experts their first chance to examine the site off Mexico City’s Zocalo plaza, between the Metropolitan Cathedral and the ruins of the Templo Mayor pyramid.

Archaeologists told The Associated Press that they have located what appears to be a six-foot-by-six-foot entryway into the tomb about 15 feet below ground. The passage is filled with water, rocks and mud, forcing workers to dig delicately while suspended from slings. Pumps work to keep the water level down.

“We are doing it very, very slowly ... because the responsibility is very great and we want to register everything,” said Leonardo Lopez Lujan, the lead government archaeologist on the project. “It’s a totally new situation for us, and we don’t know exactly what it will be like down there.”

As early as this fall, they hope to enter the inner chambers — a damp, low-ceilinged space — and discover the ashes of Ahuizotl, who was likely cremated on a funeral pyre in 1502.
By that time, Columbus had already landed in the New World. But the Aztecs’ first contact with Europeans came 17 years later, in 1519, when Hernan Cortes and his band of conquistadors marched into the Mexico Valley and took hostage Ahuizotl’s successor, his nephew Montezuma.

Ahuizotl’s son Cuauhtemoc (kwow-TAY-mock) took over from Montezuma and led the last resistance to the Spaniards in the battle for Mexico City in 1521. He was later taken prisoner and killed. Like Montezuma, his burial place is unknown.

Because no Aztec royal tomb has ever been found, the archaeologists are literally digging into the unknown. Radar indicates the tomb has up to four chambers, and scientists think they will find a constellation of elaborate offerings to the gods on the floor.

“He must have been buried with solemn ceremony and rich offerings, like vases, ornaments ... and certainly some objects he personally used,” said Luis Alberto Martos, director of archaeological studies at Mexico’s National Institute of Anthropology and History.

The tomb’s curse — water — may also be its blessing. Lopez Lujan said the constant temperature of the pH-neutral water in the flooded chambers, together with the lack of oxygen, discourages decomposition of materials like wood and bone that have been found at other digs around the pyramid, which was all but destroyed in the Conquest.

“This would be quite an important find for Aztec archaeology,” said Michael Smith, an archaeologist at Arizona State University who is not connected to the dig. “It would be tremendously important because it would be direct information about kingship, burial and the empire that is difficult to come by otherwise.”



All signs found so far point to Ahuizotl. The site lies directly below a huge, recently discovered stone monolith carved with a representation of Tlaltecuhtli (tlahl-tay-KOO-tlee), the Aztec god of the earth.

Depicted as a woman with huge claws and a stream of blood flowing into her mouth as she squats to give birth, Tlaltecuhtli was believed to devour the dead and then give them new life.

The god was so fearsome that Aztecs normally buried her depictions face down in the earth. However, this one is face-up.

In the claw of her right foot, the god holds a rabbit and 10 dots, indicating the date “10 Rabbit” — 1502, the year of Ahuizotl’s death.

“Our hypothesis is precisely that this is probably the tomb of Ahuizotl,” Lopez Lujan said."

Thursday, August 02, 2007

Excited to be alive

Newborn dolphins and killer whales don't sleep. At all.